Electrical system of distribution.



J. L. WOODBRIDGE. ELECTRICAL SYSTEM OFDISTRIBUTION. APPLICATION FILED smwxze, 1911.

7 1,078,654, Patnted Nov. 18, 1913.

Immmwr STATES PATENT orrrcu.

ELECTRICAL SYSTEM OI DISTRIBUTION.

Specification of Letters Patent.

Patented Nov. 18, 1913.

- Application filed September 29, 1911. Serial m. 651,941.-

To all whom; it may concern:

Be it known that/I, J osnrrr' Lns'rnn W001)- names, a citizen of the United States,.and a resident of Philadelphia, in the county of Philadelphia, State of Pennsylvania, ave invented certain, new and useful Improve ments in Electricai Systems of Distribution, of which thefollowing is aspecificstlon. My invention relates to systems in which there is a primary direct current circuit of variable voltage, such as the exciter circuit of an valterating current power house, to which is connecteds secondary circuitffor supplying current to certain apparatus, such as solenoids for operating oil switches and signal lamps. In 'such systems it is' customcry to use a storage battery for supplying current to the secondary circuit in case of any interruption on the primary circuit, On account of the variation of voltage on the primary circuit, it is necessary, if the battery is to be connectedat-ull times to the circuit, to provide some means for preventing the batter from charging and dischargin with variations in the'circuit voltage 'ot erw-ise the battery must remain disconnected from the circuit, and some automatic switch ber'elied on to makethe' connection in case of trouble. In such a system, arran ed' in accordance with my invention, the attery is connected to the secondary circuitthrough the medium of anelectrolytic valve, the voltage of the battery being less than the minimum voltage occurring on the circuit during. ordinary operation. The valve prevents current from flowing into the battery from the circuit, but upon an abnornal reduction of the circuit voltage permits the battery to discharge into the circuit. I have also shown an automatic switch for disconnecting the-secondary circuit; from the primary circuit in case of an interruption .on the hitter. f y

M invention will be more clearly underby reference to the accompanying drawing which is s 'dis ammstic representation of -a-system em features of the inventionsnd in which-.

primer circuit-1 2, which maybe the ex'-' citer c1rfcu1t of snslternsting current ststion supplyin current to the fields of the ultcrnstors, e which one is re stF.

G is a generator supplying current to the shown at- L, end a solenoid Q which repremersed in suitable electrolyte, sue as a solution of borate' of ammonium. It is the. well known characteristic of such a valve to permit current to flow from the iron plate'to the aluminum plate-but to prevent flow ofcurrent in the opposite direction. An automatic switch S is shown which, when closed, as shown, connects the conductors 1 and 3 at the contacts '5 and 6. Switch S is held closed by an electromagnet M which is provided with two windings 7 and ,8. The w1nd ing 8 is connected acrossthe circuit 1''2 and serves to hold the switch closed except when its effect is opposed by that of the winding 7. The latter winding is connected in series between conductor 1 and conductor 3, and when the current flow is in the direction from '1 to 3, this winding cooperates with, winding 8 to hold the switch closed. If, however, the flow; of current in winding 7 is reversed, which would occur if the voltage of the generator G drops sufliciently to permitithe battery to discharge back mto the circuit 1-2, the efiect of winding Twill be to oppose winding 8, and release the' switch which will then be opened by the spring Y, thus disconnectin conductor 1 from conductor 3. Current will then be furnished by the battery B to the circuit 3-4 through the valve V, thus avoiding any in terruption of the power supply to this circuit. The field winding F, being connected to the primary circuit 1-2, is also disconnected from the battery by opening the switch S, so that the battery need not be of sufiicient capacity to supply this field current.

" A rheostst R and a switch S are shown in the circuit connected around the valve-V. When the switch S'is closed, the battery B may be charged through the. rheostat R.

.' Having described. my invention what I claim, and desire'to secure by Letters Patout is 4 1. In combin'stlon, a d rect current spurc'e 0t .-vsryin'g voltage, a. "consumpt1oncircuit to the 'source, a store e battery connected to said circuit and of vo tagelnoran electroiy electrolytic valve interp anally electrolyt-i tery and pose the iio than that of the source, and an connected between the bat- :oit in the direction to 0p wring current from the source bu t r1 the flow of discharge current b: seen the battery and the circuit upon. interropticai of the source.

Q. In combination, direct current circuit of varying voltage, a storage battery connected thereto, an. electrolytic valve connected between the -mitten-y and the circuit in the di; rection to oppose the flow of charging current but permit the flow of discharge current between the tmtteryiznd the circuit, and a circuit in parallel with the electrolytic valve containin appropriate resistance for charging the or-rttery from the first named circuit.

3. In combination, an electric circuit, a variable voltage source connected thereto, consumption appara us supplied therefrom, a storage battery connected to the circuit, "tic valve interposed between the battery and the circuit in thedirection to oppose t le flow of charging current but permit the flow of discharge current between the battery and the circuit, and an automatic switch actuated by discharge current from the battery, and adapted to disconnect the source from the circuit.

combination, an electric circuit, a oltage source connected thereto, on apparatus supplied therefrom, a storage cattery conne ed to the circuit, an

d between the haton. direction to optery and the circuit in pose the flow of charging current-but permit the flow of discharge current between the battery and the circuit, and an automatic switch actuated by discharge current from the battery and adapted to disconnect the source and a part of the consumption apparatus from the circuit.

5. In combination, an electric circuit, a variable voltage source connected thereto, consumption apparatus supplied therefrom, a storage battery connectedto thecircuit, an electrolytic valve interposed between the battery and the circuitin the direction to oppose the flow of charging current but permit the flow of discharge current between the battery andthe circuit, and an automatic switch'adapted to disconnect t-he source from the circuit.

6. In combination, an electric circuit a variable voltage source connected thereto, consumptionapparatus supplied therefrom, a storage battery coimected to the circuit,- an electrolytic valve interposed between the battery and the circuit in the direction, to

oppose the flow of charging currentbut I have hereunto. 

